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The approach surfaces, shown on St. Catharines Airport Zoning Plan No. 26-047-81-67, Sheets 1, 2, 4, 5, 6, 8, 9, 10, 11 and 12 dated March 30, 1984, are surfaces abutting each end of the strips associated with the runways designated 06-24, 10-28 and 01-19 and are described as follows:
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